CN103776666A - Six-channel air particle sampling device - Google Patents
Six-channel air particle sampling device Download PDFInfo
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- CN103776666A CN103776666A CN201410052631.8A CN201410052631A CN103776666A CN 103776666 A CN103776666 A CN 103776666A CN 201410052631 A CN201410052631 A CN 201410052631A CN 103776666 A CN103776666 A CN 103776666A
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Abstract
The invention discloses a six-channel air particle sampling device. The sampling device adopts a dividing device to divide collected TSP particles into six parts according to isotropy, six paths of air can be any combination of a straight pipe, PM10 and PM10 cutter to PM2.5 cutter, the obtained particles can be any combination of TSP, PM10 and PM2.5, and the six paths of air can be connected with the air pumping end of a sampling pump by virtue of a flow rate control device after being filtered by a filter membrane and discharged by virtue of the filter. The six-channel air particle sampling device is small in size, light in weight and convenient to move and maintain; by utilizing the characteristic that the sampling flow of a middle-flow cutter is equal to that of a small-flow cutter, the homologous parallel sampling is actually realized, the adopted cutters are the standard cutters, the multi-circuit TSP, PM10 or (and) PM2.5 homologous parallel sampling is realized by utilizing one TSP cutter, and six groups of parallel sampling can be realized at most.
Description
Technical field
The present invention relates to air particle sampling field, be specifically related to a kind of six channel air particle samplers.
Background technology
Along with the quickening of China's process of industrialization and the high speed development of national economy; Atmospheric particulates are increasing on the impact of atmospheric environment; Atmospheric particulates refer to the general name that is dispersed in the solid-state or liquid particles shape material in atmosphere; its particle size range is about 0.1-100 micron, and monitoring, analysis and the research to it is the emphasis of current environment protection work.In environmental monitoring field, for different research objects, the monitoring range of air particle mainly comprises that aerodynamic diameter is less than or equal to the overall suspended pellet TSP(Total Suspended Particulate of 100 μ m), aerodynamic diameter is less than or equal to the pellet PM10(Particles with Diameters of 10 μ m or less of 10 μ m) and aerodynamic diameter be less than or equal to tri-kinds of the fine particle PM2.5 of 2.5 μ m.For analyzing the constituent of variable grain thing, need to carry out Parallel Sampling to same period, the airborne particle of same place and environment.
For guaranteeing accuracy and the reliability of sampled result, in " the manual monitoring method of HJ 656-2013 ambient air particulate matter (PM2.5) (gravimetric method) technical manual " implemented on August 1st, 2013, explicitly call for " during when many sampling thief Parallel Samplings; if when the sampling flow≤200L/min of sampling thief, distance is each other 1m left and right; If when the sampling flow > 200L/min of sampling thief, distance is each other (2 ~ 4) m ".Can increase job costs if adopt many sampling thiefs to realize Parallel Sampling, and the performance difference of multiple sampling thiefs can affect follow-up particle precision of analysis.More it is evident that and operate many sampling thiefs simultaneously to carry out particle sampling be also extremely inconvenient.
Patent 201010208349.6 tri-channel atmosphere particulate matter samplers are mentioned a kind of multi-channel sampling device, adopt the multiple sampling heads of host configuration to sample.Between the multiple sampling heads of this instrument, spacing must meet the requirement of HJ 656-2013, each sampling head is connected with filter membrane through long connecting link (being rectification bar), thereby the particle collecting can cause certain loss to affect the correctness of sampled result through so long sampling head pole before arriving filter membrane.In addition also can cause that instrument is bulky, the defect of inconvenient operation.
Summary of the invention
The object of the invention is to for the deficiencies in the prior art, a kind of six channel air particle samplers are provided.The TSP part of this sampling thief is middle flow (100L/min) standard TSP cutter, adopt part flow arrangement that the TSP particle collecting is divided into six parts according to isotropy, every road flow 16.67L/min(low discharge air granule sampler flow), for meeting different analysis purposes, six road gases can be divided into the combination in any of straight tube, PM10 and PM10 cutter-PM2.5 cutter, and the particle obtaining can be the combination in any of TSP, PM10 and PM2.5.
To achieve these goals, the technical solution of employing is in the present invention:
A kind of six channel air particle samplers, its top is the middle flow TSP cutter that a flow is 100L/min; TSP cutter below connects a part flow arrangement, surrounding air is after this TSP cutter, the particle that is greater than 100 μ m is blocked on outside cutter and can not enters in sampling thief, the gas that comprises TSP particle enters special part flow arrangement by connecting link, 100L/min flow is divided into six tunnels by part flow arrangement, every road flow 16.67L/min; The described Liu of being divided into road gas is respectively by being directly connected with filter membrane clip or being connected with filter membrane clip or being connected with filter membrane clip by PM10 cutter-PM2.5 cutter by PM10 cutter; The gas flow that filter through filter membrane clip on six tunnels is bled to hold with sampling pump respectively through volume control device and is connected, and discharges after filtering by filtrator.
Further, described part flow arrangement comprises upper end cover, bottom end cover, shunting chamber, air flow inlet, air stream outlet, fluid dividing cover, described shunting chamber is the seal chamber that upper end cover and bottom end cover form, described fluid dividing cover is arranged in shunting chamber, described fluid dividing cover is fixed on the center of bottom end cover, and described fluid dividing cover is conical, and described upper end cover is provided with air flow inlet, on the circumference of described bottom end cover, be evenly equipped with multiple air stream outlets, on each air stream outlet, be connected with rectification bar; Described air flow inlet is connected with the TSP cutter at sampling thief top; Described rectification bar is connected with filter membrane clip or the PM10 cutter of part flow arrangement below.
Further, the inwall of described part flow arrangement and the outside surface of fluid dividing cover are all smooth, smooth, and are equipped with inert material layer on the inwall of part flow arrangement and the outside surface of fluid dividing cover, and this inert material layer is made up of the inert material of low absorbability.
Further, described fluid dividing cover is hard aluminium alloy material, and the surface of this hard aluminium alloy is through anodized.
Further, described fluid dividing cover is conical, and conical fluid dividing cover drift angle is 60 ° ~ 100 °.
Further, on rectification bar, edge is tangent with the inside surface of upper end cover and the lower surface of fluid dividing cover respectively.
Further, rectification bar is through-type connecting link or back taper connecting link.
Further, the gas Wei Liu road that described part flow arrangement is split into; Described every road gas is directly connected with filter membrane clip by rectification bar, or is connected successively with PM10 cutter, filter membrane clip by rectification bar, or is connected successively with PM10 cutter, PM2.5 cutter, filter membrane clip by rectification bar.
Further, described volume control device is gas meter, and described sampling pump is vacuum pump.
Compared with prior art, its advantage is in the present invention:
1, instrument has utilized middle flow cutter sampling flow and the characteristic that six times of low discharge cutter sampling flows equate cleverly, realizes the homology Parallel Sampling in real significance, and the cutter adopting is standard cutter.
2, utilize a TSP cutter realize multichannel TSP or (with) PM10 or (with) PM2.5 homology Parallel Sampling, can realize at most six groups of Parallel Samplings.
3, instrument volume is little, lightweight, is convenient to mobile, maintenance.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation of the present invention described in embodiment 1.
Accompanying drawing 2 is the structural scheme of mechanism of the present invention described in embodiment 2.
Accompanying drawing 3 is the sectional view of hyperchannel air particle sampling part flow arrangement.
Accompanying drawing 4 is for removing the hyperchannel air particle sampling part flow arrangement vertical view after upper end cover.
Wherein: 1, air flow inlet; 2, shunting chamber; 3, upper end cover; 4, fluid dividing cover; 5, bottom end cover; 6, rectification bar; θ, fluid dividing cover drift angle.
Embodiment
Embodiment below in conjunction with accompanying drawing 1 ~ 4 is further described in detail with principle of work structure composition of the present invention.
Embodiment mono-
As shown in Figure 1, sampling pump 118 sucks TSP cutter 11 with 100L/min flow by the surrounding air that comprises particle, under this flow, the particle that aerodynamic size is greater than 100 μ m by this TSP cutter 11 is got rid of outside sampling thief, and the particle of aerodynamic diameter≤100 μ m enters in part flow arrangement 12 with air-flow.It is 16.67L/min that volume control device 117 is accurately controlled the flow that enters six gas circuits, and sampling membrane is diameter 47mm standard filter membrane, and the air-flow that part flow arrangement 12 guarantees to enter every gas circuit is by the air-flow of isotropy principle uniform distribution.Connecting link 13 is directly connected with filter membrane 112 with filter membrane 111 with connecting link 14, and the particle being trapped on filter membrane 111 and filter membrane 112 is TSP.PM10 cutter 15 is directly connected with filter membrane 114 with filter membrane 113 with PM10 cutter 16.The particle that aerodynamic diameter is greater than 10 μ m by PM10 cutter 15 and PM10 cutter 16 is retained down, and the particle being trapped on filter membrane 113 and filter membrane 114 is the PM10 of aerodynamic diameter≤10 μ m.PM10 cutter 17 be connected with PM2.5 cutter 19 with PM2.5 cutter 110 with PM10 cutter 18 (PM10 cutter and PM2.5 cutter are connected to form PM10 cutter-PM2.5 cutter).The particle that aerodynamic diameter is greater than 2.5 μ m by PM2.5 cutter 110 and PM2.5 cutter 19 is retained down, the particle of aerodynamic diameter≤2.5 μ m is with gas shock on filter membrane 115 and filter membrane 116, and the particle that filter membrane 115 and filter membrane 116 are held back is PM2.5.
Bleeding to hold with sampling pump 118 respectively through volume control device 117 through the gas flow of the membrane filtration on filter membrane clip and be connected in six tunnels, and discharges after filtering by filtrator, and particle can again not enter cutter sampled result is impacted.Described volume control device 117 is gas meter, described sampling pump 118Wei six road minipumps.
TSP cutter 11 used is middle flow TSP cutter, and this TSP cutter meets the middle flow TSP sampling thief size of regulation in " the sampling thief technical requirement of HJ/T 374-2007 overall suspended pellet and detection method " completely.PM10 cutter 16,17,18 used and low discharge PM2.5 cutter 19,110 meet " HJ 93-2013 ambient air particulate matter (PM10 and PM2.5) sampling thief technical requirement and detection method " Appendix B low discharge impacting type cutter design requirement completely.
As shown in Figure 3,4, described part flow arrangement comprises upper end cover 3, bottom end cover 5, shunting chamber 2, air flow inlet 1, air stream outlet, fluid dividing cover 4, the seal chamber that shunting chamber 2 forms for upper end cover 3 and bottom end cover 5, fluid dividing cover 4 is arranged in shunting chamber 2, fluid dividing cover 4 is fixed on the center of bottom end cover 5, and fluid dividing cover 4 is conical.On upper end cover 3, be provided with air flow inlet 1, air flow inlet 1 is connected with TSP cutter.On the circumference of end cap 5, be evenly equipped with 6 air stream outlets, on each air stream outlet, be all connected with rectification bar 6.The gas that enters shunting chamber 2 enters in six rectification bars 6 after fluid dividing cover 4 shuntings.Fluid dividing cover 4 smooth surfaces, smooth, are hard aluminium alloy material, and the surface of this hard aluminium alloy is through anodized.Flow in the surface that gas enters shunting rear edge, chamber 2 conical fluid dividing cover 4, while having avoided air-flow directly to impact on bottom end cover 4, bulky grain thing holds back, also after having avoided entering large cavity, gas flow rate reduces suddenly the particle sedimentation causing simultaneously, has guaranteed the accuracy of sampled result.On rectification bar 6, edge is tangent with the inside surface 3 of upper end cover and the lower surface of fluid dividing cover 4 respectively, to guarantee that it receives the gas of being shunted by fluid dividing cover 4 to greatest extent.Secondary rectification bar 6 is connected or is directly connected with filter membrane clip with PM10 cutter.For structurally realizing connectivity, secondary rectification bar can be through-type connecting link or back taper connecting link as shown in Figure 3.For guaranteeing isotropy shunting effect, the optimum span of fluid dividing cover vertex angle theta is 60 ° to 100 °, can reduce particle and impact the decomposing force perpendicular to taper surface behind fluid dividing cover 4 surfaces, thereby guarantee accuracy and the reliability of sample effect.This part flow arrangement is simple in structure, volume is little, convenient operation, maintenance.Gas flows along the surface of conical fluid dividing cover after entering shunting chamber, while having avoided air-flow directly to impact on bottom end cover, bulky grain thing holds back, also after having avoided entering large cavity, gas flow rate reduces suddenly the particle sedimentation causing simultaneously, has guaranteed the accuracy of sampled result.Can realize in homology and gather multiple different-grain diameter particle in power situation simultaneously, take into full account the impact of aerodynamics factor on particle movement locus, improve the accuracy of homology particle sampling, reduce particle loss.Utilize a described part flow arrangement to realize same period, the airborne particle of same place and environment are carried out to Parallel Sampling, not only can save cost of products but also can improve the convenience of instrumentation.
The outside surface of the inwall of described part flow arrangement and fluid dividing cover 4 is all smooth, smooth, and on the outside surface of the inwall of part flow arrangement and fluid dividing cover 4, be equipped with inert material layer, this inert material layer is made up of the inert material of low absorbability, can guarantee that all particulates that enters part flow arrangement with air-flow enters multiple sampling channels according to isotropy.In addition, air stream outlet latus rectum should be large as much as possible, to reduce the dead space area of gas flow.Air stream outlet connects rectification bar, along airflow direction, large latus rectum air stream outlet is converted to little latus rectum connecting link, has reduced direct reducing to the holding back of gas particles thing, and guarantees the accuracy of sample effect, is simultaneously also conveniently connected with downstream cutter or filter membrane clip.
This embodiment can realize two-way TSP, two-way PM10 and two-way PM2.5 homology Parallel Sampling.
Embodiment bis-
As shown in Figure 2, sampling pump 219 sucks TSP cutter 21 with 100L/min flow by the surrounding air that comprises particle, under this flow, the particle that aerodynamic size is greater than 100 μ m by this TSP cutter 21 is got rid of outside sampling thief, and the particle of aerodynamic diameter≤100 μ m enters in part flow arrangement 22 with air-flow.It is 16.67L/min that volume control device 218 is accurately controlled the flow that enters six gas circuits, and sampling membrane is diameter 47mm standard filter membrane, and the air-flow that part flow arrangement 22 guarantees to enter every gas circuit is by the air-flow of isotropy principle uniform distribution.PM10 cutter 23, PM10 cutter 24 and PM10 cutter 25 are directly connected with filter membrane 212, filter membrane 213 and filter membrane 214.The particle that aerodynamic diameter is greater than 10 μ m by PM10 cutter 23, PM10 cutter 24 and PM10 cutter 25 is retained down, and the particle being trapped on filter membrane 212, filter membrane 213 and filter membrane 214 is the PM10 of aerodynamic diameter≤10 μ m.PM10 cutter 26, PM10 cutter 27 and PM10 cutter 28 are connected with PM2.5 cutter 29, PM2.5 cutter 211 and PM2.5 cutter 210.The particle that aerodynamic diameter is greater than 2.5 μ m by PM2.5 cutter 29, PM2.5 cutter 211 and PM2.5 cutter 210 is retained down, the particle of aerodynamic diameter≤2.5 μ m is with gas shock on filter membrane 215, filter membrane 216 and filter membrane 217, and the particle that filter membrane 215, filter membrane 216 and filter membrane 217 are held back is PM2.5.
The six tunnels after filtration gas flow of membrane filtration are connected with sampling pump 219 end of bleeding respectively through volume control device 218, and filter afterwards discharge by filtrator, and particle can again not enter cutter sampled result is impacted.Described volume control device 218 is gas meter, described sampling pump 219Wei six road minipumps.
As shown in Figure 3,4, described part flow arrangement comprises upper end cover 3, bottom end cover 5, shunting chamber 2, air flow inlet 1, air stream outlet, fluid dividing cover 4, the seal chamber that shunting chamber 2 forms for upper end cover 3 and bottom end cover 5, fluid dividing cover 4 is arranged in shunting chamber 2, fluid dividing cover 4 is fixed on the center of bottom end cover 5, and fluid dividing cover 4 is conical.On upper end cover 3, be provided with air flow inlet 1, air flow inlet 1 is connected with TSP cutter.On the circumference of end cap 5, be evenly equipped with 6 air stream outlets, on each air stream outlet, be all connected with rectification bar 6.The gas that enters shunting chamber 2 enters in six rectification bars 6 after fluid dividing cover 4 shuntings.Fluid dividing cover 4 smooth surfaces, smooth, are hard aluminium alloy material, and the surface of this hard aluminium alloy is through anodized.Flow in the surface that gas enters shunting rear edge, chamber 2 conical fluid dividing cover 4, while having avoided air-flow directly to impact on bottom end cover 4, bulky grain thing holds back, also after having avoided entering large cavity, gas flow rate reduces suddenly the particle sedimentation causing simultaneously, has guaranteed the accuracy of sampled result.On rectification bar 6, edge is tangent with the inside surface 3 of upper end cover and the lower surface of fluid dividing cover 4 respectively, to guarantee that it receives the gas of being shunted by fluid dividing cover 4 to greatest extent.Secondary rectification bar 6 is connected or is directly connected with filter membrane clip with PM10 cutter.For structurally realizing connectivity, secondary rectification bar can be through-type connecting link or back taper connecting link as shown in Figure 3.For guaranteeing isotropy shunting effect, the optimum span of fluid dividing cover vertex angle theta is 60 ° to 100 °, can reduce particle and impact the decomposing force perpendicular to taper surface behind fluid dividing cover 4 surfaces, thereby guarantee accuracy and the reliability of sample effect.
The outside surface of the inwall of described part flow arrangement and fluid dividing cover 4 is all smooth, smooth, and on the outside surface of the inwall of part flow arrangement and fluid dividing cover 4, be equipped with inert material layer, this inert material layer is made up of the inert material of low absorbability, can guarantee that all particulates that enters part flow arrangement with air-flow enters multiple sampling channels according to isotropy.In addition, air stream outlet latus rectum should be large as much as possible, to reduce the dead space area of gas flow.Air stream outlet connects rectification bar, along airflow direction, large latus rectum air stream outlet is converted to little latus rectum connecting link, has reduced direct reducing to the holding back of gas particles thing, and guarantees the accuracy of sample effect, is simultaneously also conveniently connected with downstream cutter or filter membrane clip.
This embodiment can realize three PM10 He San road, road PM2.5 homology Parallel Samplings.
Simultaneously the present invention is also provided with smart steering system, samples by an operating system control multichannel simultaneously, easy and simple to handle, sampled result accuracy is high.
Certainly, above-mentioned explanation is not limitation of the present invention, and the present invention is also not limited in above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art make in essential scope of the present invention, also should belong to protection scope of the present invention.
Claims (9)
1. six channel air particle samplers, is characterized in that, its top is the middle flow TSP cutter that a flow is 100L/min; TSP cutter below connects a part flow arrangement, surrounding air is after this TSP cutter, the particle that is greater than 100 μ m is blocked on outside cutter and can not enters in sampling thief, the gas that comprises TSP particle enters special part flow arrangement by connecting link, 100L/min flow is divided into six tunnels by part flow arrangement, and every road flow is 16.67L/min; The described Liu of being divided into road gas is respectively by being directly connected with filter membrane clip or being connected with filter membrane clip or being connected with filter membrane clip by PM10 cutter-PM2.5 cutter by PM10 cutter; The gas flow that filter through filter membrane clip on six tunnels is bled to hold with sampling pump respectively through volume control device and is connected, and discharges after filtering by filtrator.
2. a kind of six channel air particle samplers according to claim 1, it is characterized in that, described part flow arrangement comprises upper end cover, bottom end cover, shunting chamber, air flow inlet, air stream outlet, fluid dividing cover, described shunting chamber is the seal chamber that upper end cover and bottom end cover form, described fluid dividing cover is arranged in shunting chamber, described fluid dividing cover is fixed on the center of bottom end cover, described fluid dividing cover is conical, described upper end cover is provided with air flow inlet, on the circumference of described bottom end cover, be evenly equipped with multiple air stream outlets, on each air stream outlet, be connected with rectification bar; Described air flow inlet is connected with the TSP cutter at sampling thief top; Described rectification bar is connected with filter membrane clip or the PM10 cutter of part flow arrangement below.
3. a kind of six channel air particle samplers according to claim 2, it is characterized in that, the inwall of described part flow arrangement and the outside surface of fluid dividing cover are all smooth, smooth, and on the inwall of part flow arrangement and the outside surface of fluid dividing cover, be equipped with inert material layer, this inert material layer is made up of the inert material of low absorbability.
4. a kind of six channel air particle samplers according to claim 2, is characterized in that, described fluid dividing cover is hard aluminium alloy material, and the surface of this hard aluminium alloy is through anodized.
5. a kind of six channel air particle samplers according to claim 2, is characterized in that, described fluid dividing cover is conical, and conical fluid dividing cover drift angle is 60 ° ~ 100 °.
6. a kind of six channel air particle samplers according to claim 2, is characterized in that, on rectification bar along tangent with the inside surface of upper end cover and the lower surface of fluid dividing cover respectively.
7. a kind of six channel air particle samplers according to claim 2, is characterized in that, rectification bar is through-type connecting link or back taper connecting link.
8. a kind of six channel air particle samplers according to claim 2, is characterized in that the gas Wei Liu road that described part flow arrangement is split into; Described every road gas is directly connected with filter membrane clip by rectification bar, or is connected successively with PM10 cutter, filter membrane clip by rectification bar, or is connected successively with PM10 cutter, PM2.5 cutter, filter membrane clip by rectification bar.
9. a kind of six channel air particle samplers according to claim 1, is characterized in that, described volume control device is gas meter, and described sampling pump is vacuum pump.
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| CN103966081A (en) * | 2014-05-09 | 2014-08-06 | 北京联合大学 | Negative-pressure filter membrane microbial sampler |
| CN104458358A (en) * | 2014-11-28 | 2015-03-25 | 中国地质科学院水文地质环境地质研究所 | Device and method for extracting PM2.5 component from loose particulate matters |
| CN104568520A (en) * | 2014-12-30 | 2015-04-29 | 青岛恒远科技发展有限公司 | Portable sampling device for pollution source dilution tunnel particles |
| CN104792582A (en) * | 2015-05-05 | 2015-07-22 | 青岛精益信电子技术有限公司 | Pollution source fine particulate matter dilution sampling method and device |
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| CN103966081A (en) * | 2014-05-09 | 2014-08-06 | 北京联合大学 | Negative-pressure filter membrane microbial sampler |
| CN103966081B (en) * | 2014-05-09 | 2015-12-09 | 北京联合大学 | A kind of negative pressure filter membrane microorganism sampler |
| CN104458358A (en) * | 2014-11-28 | 2015-03-25 | 中国地质科学院水文地质环境地质研究所 | Device and method for extracting PM2.5 component from loose particulate matters |
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| CN104819873A (en) * | 2015-04-21 | 2015-08-05 | 上海新拓分析仪器科技有限公司 | Flow control device of medium-large flow gas and particles and application method thereof |
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| CN105510091A (en) * | 2016-01-15 | 2016-04-20 | 青岛绿蓝环保技术有限公司 | Multi-channel air particulate matter sampler flow calibration switching device |
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| WO2019041963A1 (en) * | 2017-08-28 | 2019-03-07 | 太原海纳辰科仪器仪表有限公司 | Multichannel sampler having distributing structure |
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| CN108663240A (en) * | 2018-06-28 | 2018-10-16 | 北京市环境保护监测中心 | Atmospheric particulates sample current divider |
| CN109141993A (en) * | 2018-10-31 | 2019-01-04 | 江苏迈尚环保科技有限公司 | A kind of multichannel shunt air particle cutter and its application method |
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